Dental instrument



FIG. 1 is a perspective view of my design for a dental instrument;

FIG. 2 is a left side view of the dental instrument, the right side being a mirror image thereof;

FIG. 3 is a back view of the dental instrument;

FIG. 4 is a top view thereof; and,

FIG. 5 is a bottom view thereof. 

The ornamental design for a dental instrument, as shown and described. 